TY  - BOOK
AU  - Riggs Fred W
TI  - Help for social scientists :  A new kind of reference process
SN  - 9231024140
U1  - Sigma:f, M6 
PY  - 1986///
CY  - Paris
PB  - UNESCO        
KW  -  RESEARCH METHODS
KW  - SOCIAL SCIENCES
ER  -